Create plugins/ directory if doesn't exist when refresing plugins

src/plugin.cpp

@@ -92,8 +92,6 @@ static int loadPlugin(std::string slug) {
 }
 
 void pluginInit() {
-
-
 	// Load core
 	// This function is defined in core.cpp
 	Plugin *corePlugin = init();
@@ -242,6 +240,7 @@ static void pluginRefreshPlugin(json_t *pluginJ) {
 
 	// Download zip
 	std::string filename = "plugins/";
+	mkdir(filename.c_str(), 0755);
 	filename += slug;
 	filename += ".zip";
 	bool success = requestDownload(download, filename, &downloadProgress);

src/util/request.cpp

@@ -103,11 +103,6 @@ json_t *requestJson(RequestMethod method, std::string url, json_t *dataJ) {
 }
 
 
-static size_t writeFileCallback(char *ptr, size_t size, size_t nmemb, void *userdata) {
-	FILE *file = (FILE*) userdata;
-	return fwrite(ptr, size, nmemb, file);
-}
-
 static int xferInfoCallback(void *clientp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow) {
 	float *progress = (float*) clientp;
 	if (progress) {